Shagang Group RFID vehicle entry and exit automatic identification system case
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Vehicle management system
Shagang Group Vehicle Entry and Exit Automatic Identification System
1. Project overview
According to the requirements of the company’s leadership, it is necessary to manage all types of vehicles entering and leaving Shagang Group’s guards (including various types of vehicles such as material trucks, small cars, private cars, and customer vehicles). After investigation, we put forward the following technical requirements: Build a set of vehicle management system for car swiping card.
2. Early stage background of the project
At present, Shagang Group already has a mature access control credit card management system (IC card), each guard is equipped with a PC, the management center has a PC Server, all networks have been connected, the PC and the credit card machine (ie control The wireless communication method is adopted between the devices, and the schematic diagram is as follows:
Third, the principle requirements of the vehicle swiping system
The vehicle swiping system can be regarded as a new type of vehicle swiping system that is superimposed on the original access control swiping management system (without changing, modifying, or destroying the original access control swiping system). The system can understand each one at any time The situation of the car passing the guard at the company (including the time of entry and exit). The general schematic diagram is as follows:
The figure above illustrates:
In the picture above, we can see that in addition to the original staff swiping machine, each guard has a new reader and two antennas. The reader is connected to the computer by wire, and the antenna and reader are also wired, but the antenna is only allowed to be installed on the same side of the guard, and the intersection of the coverage of the two antennas is an empty set, and the width of the empty set The formula L1>V/N should be satisfied, and the effective swipe width covered by each antenna should satisfy L2>V/N (set: empty set width is L1; antenna effective coverage width is L2; vehicle speed is V, the average value of V It is tentatively set to 40Km/h; the frequency of the antenna reading the card signal is N), and at the same time, the antennas between the guards must not interfere with each other.
The function of the reader in the picture: It mainly receives the signal collected from the antenna and has the function of storing records, that is, when the computer is turned off, the car can still swipe the card without data loss.
In the picture, there are two guards (Wuganhe Guard 1 and Wuganhe Guard 2) work in a stand-alone mode, and the database data is imported and exported manually.
working principle
Take the above picture as an example. When a car with an RFID card passes by the guard, if the antenna 2 reads the card first, and then the antenna 1 reads the card, the software judges that the car is entering the door, otherwise, it is going out.
Note: When a vehicle with an RFID card passes by the guard (not through the guard), the system should not be reflected in the way of recording.
4. Technical description and requirements
The vehicle entry and exit automatic identification system uses RFID (Radio Frequency Identification) technology to identify vehicles at the entrance and exit of the car without stopping, so as to realize the control of the entry and exit of the vehicle, and save the records of the door guards of the vehicle entry and exit for the relevant departments to inquire. The system can effectively solve the problem of false reporting of the workload of the transportation drivers, false reporting of the whereabouts of the driver of the trolley (including private cars), registration of foreign vehicles entering the factory and tracking their import and export conditions.
The radio frequency card used in this scheme is an RFID card (Radio Frequency Identification), and its basic meaning is to use radio technology to apply radio frequency identification signals to realize automatic identification of stationary or moving objects or persons. The application areas of radio frequency identification include: automobile access control prohibition management, road electronic toll collection system (ETC), container, cargo identification, railway locomotive and vehicle identification and tracking, commercial fleet management, road toll field radio frequency identification technology-automatic vehicle identification (AVI )Wait. Its basic composition is the reader and the electronic label two parts. The code or other information of the person or object to be identified is stored in the electronic tag. The reader is a radio transmitting and receiving device, and the content in the electronic tag can be read correctly only through a communication frequency and related protocols. There is no need for contact between the reader and the electronic tag. When the electronic tag with object information is attached to the object to be identified, when the object to be identified is within the effective query range of the reader, the electromagnetic field coupling induces reflection with the object to be identified. The microwave that identifies the basic information of the object is returned to the reader, and the tag chip is equivalent to a storage body with a radio transceiver function.
There are two types of electronic tags: active and passive. Active electronic tags need to be equipped with batteries, with a long reading and writing distance, up to about 80 meters. Passive electronic tags do not need to be equipped with batteries, and rely entirely on the electromagnetic field of the reader antenna to provide working energy , The effective reading distance is 7 meters.
According to the actual situation of the company’s guard, the radio frequency card in this scheme can use active electronic tags and passive electronic tags, but Party B has confirmed that passive electronic tags are used to implement the car swiping system.
The RFID card equipped with each vehicle can be printed on the surface of the card with information such as the card number or bar code. For company fixed vehicles, the RFID card can be affixed to the front windshield of the vehicle; for foreign vehicles, the RFID card can be affixed to the temporary pass.
The core components in this solution, namely control system components, are readers and antennas. After the reader and antenna are connected, they are directly integrated into the existing personnel swiping system, and connected through the 485 communication line, without the need to purchase a guard computer.
System Requirements
The system is currently designed and installed in 11 locations, with a total of more than 2,000 freight vehicles, cars, private cars, and foreign vehicles throughout the company.
The unit’s vehicles and fixed private cars are issued with fixed cards that can enter and exit at will. Foreign vehicles must apply for a valid pass or temporary card at the relevant department. Check the situation of the guard at any time.
How to apply for a card
For fixed cards, the application center can perform unified processing and store the data in the database at one time; for temporary cards, it can be processed by the company’s designated department. For the temporary card processing, we decided to use the scanning input method, that is, use the scanner to scan the driving license and driving license of the foreign vehicle, and vectorize the scan result, manually modify the misjudged field, and then transfer the RFID card Associate with this record.All cards can be processed at any time and cancelled at any time
Function realization
The “Automatic Vehicle Entry and Exit Identification System (AVI)” uses a database, and uses a distributed method like the existing access control system, sharing a database platform, a network platform, and an operating system platform. The system has good scalability. According to requirements, it can provide interfaces to the logistics system (or ERP system, sales system) and weighing system at any time to check and inspect the types, quantities, and weights of the goods shipped.
1. Certification center management system (can also be used for storage and transportation companies)
Function module
1 Driver (including driving license, driving license) basic information management (add, modify, delete, query)
2 Vehicle information management (add, modify, delete, query)
3 Management of official and temporary vehicle cards (issuance, cancellation)
4 Vehicle temporary card renewal processing
5 Model and vehicle management ((add, modify, delete, query))
6 Real-time monitoring of vehicle entry and exit
7 Vehicle in and out flow query
8 Daily workload statistics of vehicles entering and leaving
9 Statistics of vehicle in and out flow (by gate, unit, date, etc.)
10 Statistics on the number of vehicles applying for cards
11 Operator management
12 Blacklist processing
2. Gate post query subsystem
Function module
1 Vehicle and vehicle card information query
2 Real-time swipe card monitoring of vehicles
3 Query of vehicle credit card flow
3. Data processing subsystem
Function module
1 Regular database backup
2 Data flow arrangement
3 Regular upload of vehicle swiping flow and regular download of server dictionary data.
System configuration instructions
Each doorman’s car passage has an average width of 11 meters. The vehicles passing by the door include large material trucks, medium trucks, and small cars. Two 5~6 meters high galvanized pipe columns are erected on the side of each doorman close to the doorman’s room. (The actual height depends on the site environment), the diameter is 48mm, each tube is equipped with an RFID antenna (the card reading distance is about 20 meters), and each RFID card reader is connected to the PC through RS485. It is also possible to install a “7”-shaped pole on the guard according to the actual situation. The antenna can be installed at different positions of the “7”-shaped pole according to the actual situation, and the antenna direction can be adjusted.
Implementation plan of “Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI)”
introduction:
“Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI)” is a vehicle entry and exit management system developed by Shanghai Zhijia Information Technology Co., Ltd. The system uses RFID (Radio Frequency Identification) technology to identify vehicles at the entrance and exit without stopping, so as to control the entry and exit of the vehicle, and save the entry and exit records for inspection by relevant departments.
The specific functions of the system are as follows:
1. For storage and transportation companies to count the workload of internal transportation vehicles;
2. For security departments and storage and transportation companies to monitor the entry and exit of all vehicles that have entered Shagang;
3. For the office to monitor whether the car is used in accordance with regulations;
The system can effectively solve the problems that cannot be controlled during manual inspections such as the false report of the freight driver’s workload, the false report of the car driver’s whereabouts, and the foreign vehicles. Based on our understanding, the following implementation schemes are given for reference only.
1. Shagang vehicle entry and exit automatic identification system (SG AVI) requirements
The iron and steel group company’s plant area generally has 10 doors. The entire group company has a total of about 1,000 large and small vehicles, plus employees’ private vehicles, vehicles from outsourcing units, and vehicles temporarily visiting the factory. There are a total of about 3,000 vehicles, of which freight vehicles account for a third. Second, trolleys and commuter vehicles account for one third.
1) The width of each gate
The current situation is: the core factory door: 10 meters, the science and technology building door: one entrance and one exit two doors (each door is 9 meters wide), Runzhong Gate: 10 meters wide, Runzhong West Gate: 14 meters wide, Yongxin Gate ：12 meters wide, Yongxin South Gate: 12 meters wide, the No. 1 gate in the North District is very wide, with a width of 16 meters wide. Thermal power plant doors: one entrance and one exit two doors (each door is 5 meters wide), 3B door : 12 meters wide, the team door: 8 meters wide. Doors 3 and 5 are closed.
2) The application situation of the existing “passive RFID card vehicle management system”:
The original vehicle management system using passive RFID cards was officially launched in May 2005. Three gates were installed, the North Gate No. 1, Tieshui Gate (Yongxin South Gate) and Yongxin Gate. The storage and transportation team is responsible use. Passive RFID cards are affixed to the right glass of the car. The gates are relatively wide. When the vehicle is driving, if the vehicle passes in and out of the prescribed lane (passing on the right), there is no problem with accurate reading. The iron gate (Yongxin South Gate) ) And Yongxin Gate are currently better, vehicles can pass on the right side, and can be read when vehicles enter and exit. In actual use, it was discovered that some vehicles at Gate 1 (16 meters wide) in the North District sometimes pass along the left side (pass along the left side when entering or exiting the door). At this time, the card is about 16 meters away from the widest door from the card reader. , Cannot be read at all (the maximum effective reading distance of passive cards is 7 meters), after 8 o’clock in the evening, the automatic door will be closed in half, so that you can only pass on the left when you go out (although the vehicles entering the door pass on the left at this time) ), therefore, the card cannot be read by the vehicle going out in this case.
3) Demand situation
a. The security office needs to monitor all vehicles entering the factory area and has access control requirements. Vehicles in this unit can enter and exit at will, and foreign vehicles must go to the security department for a valid pass (Shagang vehicle card), and they can enter with the Shagang vehicle card. The security department can check the time of entry and exit of all vehicles and the gate at any time.
b. Storage and transportation companies (or vehicle management companies) need to effectively count the daily workload of trucks to avoid false reporting of workloads by drivers and some staff members.
c. The office has the need to monitor the use and whereabouts of the car to prevent users from using the car overtime in violation of regulations.
d. Security Office, Human Resources Department, Office,
e. The need to connect with the logistics system (or ERP system, sales system) and weighing system, to check and inspect the type, quantity, and weight of the goods shipped.
f. When promoting the “Automatic Vehicle Entry and Exit Identification System (SG AVI) of Shagang” at all gates of Shagang, we must fully consider the above practical problems (mainly the vehicles do not drive in the normal lane).
g. The system is required to completely share the existing hardware and software platform with the existing access control system. The PCs, databases, and operating systems of each gate are not only used as the access control system operating platform, but also the “Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI) )” bearing platform. Similarly, all the software and hardware platforms of the certification center are also the software and hardware platforms of the operation center of the system, and no additional investment is required, which greatly saves the investment of the system. The installation and debugging time of the system will be greatly shortened.
2.Introduction to RFID technology
Radio Frequency Identification RFID (Radio Frequency Identification System-Radio Frequency Identification) The basic meaning is to use radio technology to apply radio frequency identification signals to achieve automatic identification of stationary or moving objects or persons. The application areas of RFID include: car access control, road electronic toll collection system (ETC), container, cargo identification, railway locomotive and rolling stock identification and tracking, commercial fleet management, road toll field radio frequency identification technology-automatic vehicle identification (SG) AVI) etc. Its basic composition is the reader and the electronic label two parts. The code or other information of the person or object to be identified is stored in the electronic tag. The reader is a radio transmitting and receiving device, and the content in the electronic tag can be read correctly only through a communication frequency and related protocols. There is no need for contact between the reader and the electronic tag. When the electronic tag with object information is attached to the object to be identified, when the object to be identified is within the effective query range of the reader, the electromagnetic field coupling induces reflection with the object to be identified. The microwave that identifies the basic information of the object is returned to the reader, and the tag chip is equivalent to a storage body with a radio transceiver function.
There are two types of electronic tags: active and passive. Active electronic tags need to be equipped with batteries, with a long reading and writing distance, up to about 80 meters. Passive electronic tags do not need to be equipped with batteries, and rely entirely on the electromagnetic field of the reader antenna to provide working energy , The effective reading distance is 7 meters. Passive tags use external electromagnetic induction to generate electricity to transmit data. The advantage is that there is no need for any internal power. The disadvantage is that the transmission distance is shorter than that of passive tags. Active tags have internal power, but the disadvantage is that the battery must be replaced regularly (two Need to be replaced once a year).
In view of the current application of “Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI) (passive card)”, it is recommended to use one of two methods:
1. Continue to use passive RFID technology
But the prerequisite is to renovate North Gate No. 1 and several gates with very wide lanes, set up isolation pavilions in the middle of the gates, and separate the entry and exit lanes artificially, that is, according to the standards of No. 7 gates, the entrance and exit lanes cannot exceed 4 meters wide, which is strictly required All vehicles must enter the door lane when entering the door, and must walk out of the door lane when going out, never go out of the door lane when entering the door, and enter the door lane when going out.
2. Replace passive RFID technology with active RFID technology
At present, the gates in Shagang are relatively wide, and the driving vehicles do not strictly follow the entry and exit lanes. Therefore, it is also a good choice to replace the passive RFID vehicle card with an active RFID card. The disadvantage is that all vehicle cards must be replaced in the card after two years. For button batteries, if this method is adopted, our company promises to recycle the active card readers at three gates at a 30% discount.
Our company recommends using active RFID technology instead of passive RFID technology to realize the “Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI)”
3.Active RFID Shagang vehicle card and active RFID reader selection
The active card reader model is CRM-280R, which can be directly connected to the existing personnel swiping controller. There is no need to purchase a controller separately. The 2.4G microwave frequency band is used, which is an open frequency band, and has passed the international certification of high-frequency radiation electromagnetic waves under the US and EU regulations, and the power is extremely small and the time is extremely short. No harm to the human body.
The LR310A active undirected card is designed for dual batteries, and the ID number is sent regularly within 1.5 seconds. The battery can be used continuously for more than 2 years. The specification of the replacement battery is CR2032, 3V.
LR310B is a dual-battery design. When in use, press “0N” by hand to instantly transmit the encrypted ID number. This number is encrypted in the air and cannot be cracked. The battery can be used for a long time.
According to the actual situation of the gate in Shagang, the width of the gate is about 18 meters, so the long-distance active and undirected RFID card can only be used. The specific model is LR310A.
Specifications of the CRM-280R card reader
Input voltage DC12V±15%
Working current 250mA
Working temperature -10℃～+70℃
Working relative humidity 10%～95%
Interface RS485 (LR310A), Weigand (LR310A)
Card reading distance 3~45M
Card reading frequency 2.4GHz
Audio/visual prompt buzzer / LED
Card size 87mm X 55mm X 5.5mm
Size 125mm X 55mm X 13mm
Weight 250g
Card reader CRM-280R interface
Red +12VDC
Black GND
Yellow R+
Green R-
Each vehicle needs to be equipped with a read-only active and undirected RFID card. The surface of the card is printed with the logo of a large steel company, the license plate number of the vehicle, and the unit to which it belongs. The RFID card must be affixed to the center of the car window. Each gate post has an average width of 12 meters. Vehicles passing through the gate include large trucks, medium trucks, and small cars. Two 3-meter high galvanized pipe columns are erected on the side of each gate close to the guard room, with a diameter of It is 48mm, and each tube is equipped with an RFID antenna at a height of 2.5 meters (the card reading distance is about 20 meters), and each RFID card reader is connected to the controller through RS485.
4.System network topology diagram
For the PC with the vehicle entry and exit identification system of a stockyard away from the main plant area, the VPN method is used to connect to the server.
5. Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI) function realization
“Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI)” uses a database, and uses a distributed method like the existing access control system, sharing a database platform, network platform, and operating system platform. The system has good scalability. According to customer requirements, it provides interfaces to the logistics system (or ERP system, sales system) and weighing system at any time, and checks and inspects the types, quantities, and weights of the goods shipped.
Since the vehicle management system already exists, only a few tables need to be added to the original table, and some tables need to add fields.
1) Add the driver table. The fields include name, gender, driver’s license number, job number, driver’s license type, and unit name.
2) Add the list of units that the driver belongs to.
3) Add driver’s license type table.
4) Add vehicle attribute table.
5) Add a table of vehicle usage types.
6) Increase the driving license form.
7) The five fields of “driver number”, “frame number”, “engine number”, “manufacturer model” and “vehicle attributes” are added to the original fields in the vehicle table.
Shagang Vehicle Entry and Exit Automatic Identification System (SG AVI)
Function module
1 Driver (including driving license, driving license) basic information management (add, modify, delete, query)
2 Vehicle information management (add, modify, delete, query)
3 Management of official and temporary vehicle cards (issuance, cancellation)
4 Vehicle temporary card renewal processing
5 Models, vehicle management, vehicles ((add, modify, delete, query))
6 Real-time monitoring of vehicle entry and exit
7 Vehicle in and out flow query (for the supervision of storage and transportation companies)
8 Daily workload statistics of vehicles entering and leaving (for the supervision of storage and transportation companies)
9 Statistics of vehicle in and out flow (by gate, unit, date, etc.)
10 Statistics on the number of vehicles applying for cards
11 Operator management
12 Blacklist processing
Door-to-door vehicle query and real-time card swiping monitoring module
Function module
1 Vehicle and vehicle card information query
2 Real-time swipe card monitoring of vehicles
3 Query of vehicle credit card flow
Data processing module
Function module
1 Regular database backup
2 Data flow arrangement
3 Regular upload of vehicle swiping flow and regular download of server dictionary data.
The driver’s driving license and driving license are entered using OCR technology. When the scan is not clear, it needs to be manually modified. This will greatly increase the speed of entry and prevent the driver from queuing when applying for the vehicle card at the security office.
For details, please contact: Shanghai Ningzhi Information Technology Co., Ltd.
Phone: 021-50273310 021-50277118
Development Department: Extension 16, 19
Sales Department: Ext. 15, 17 and 18
Technical support: 22 extension
Fax: 021-50273310-26
Address: No. 67, Lane 377, Chenhui Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai
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